Practices and expectation of high-density seismic exploration technology in CNPC

Abstract

China National Petroleum Corporation (CNPC) carried out 2D high-density seismic surveys in western and eastern China from 2003 and 3D high-density seismic surveys in Tazhong area of Tarim Basin, Northwest margin of Junggar Basin, Qiulin Oilfield of Tuha Basin, Songliao Basin, Huanxiling of Liaohe Oilfield, and beach area of Jidong Oilfield from 2006. The total coverage area of 3D high-density seismic surveys was 654 km2 of which 100 km2 was 3D and 3C digital seismic. The surveys achieved preferable results under the high-coverage data acquisition and new data processing technologies. Technical advancement makes it possible to apply large-scale high-density seismic surveys. We can use the imaging trace density to scale whether the geometry is high-density seismic sampling in order to meet the requirement of prestack data processing. In the principle of spatial sampling with “sufficiency, equality, symmetry, and continuity”, and in combination with the geological targets and the problems to be solved, the integrated performance of acquisition, processing, and interpretation shall be the orientation of high-density seismic technologies in CNPC in future. Key words: CNPC, high-density seismic, seismic technologies, technical test